Crayford on the other hand beat the main UK car manufactures on the convertible or 3/5 door estate (as the word hatchback, wasn't in use at the time). I never knew you could buy a Austin 1800 5 door or the Morris equivialant. I know that there are diecast models of the Wolseley Six, based on the Austin 1800. Different rear light cluster, grill and wood veneer trim. Leather seats weren't an option at the time, but the Woseley did have a top speed of 120mph and was the fastest of the three. The Austrailians had a Ute version.
As to the Land Lobster, the Austin 3 L. This also comes in a diecast model, but I haven't seen the estate advertised. There was a V8 Wolseley version built but this never made it onto the sales forecourt of any dealer, but the garage at BL as it kept breaking down!!
There are no 1/24 or 1/25 plastic kits of the Austin Princess. I've got a 1/43 kit that I've started to create a fifth door and there are plenty of diecast models.
This now begs the question could the Rover V8 engine have fitted into the the '1800 series' or Austin Princess?
As the ride qualtity of the Austin 3 Litre straight six was on the boarderline of the Rolls Royce, would the 4 litre engine from RR have been the better choice of engine. Austin were to rebadge this the Rover, however sales were poor and the 3L engine drank petrol at an alarming rate. Hence the V8 alternitive and then there is the front grill, maybe they could have copied Bentley and got the appeal of Ministers or the Daimler buyer. Well several Police forces bought it and an ambulance version built.
Crayford were always on the case when it came to making odd-ball versions of stock vehicles. IIRC their 1800 hatchback used the rear window frame welded to the boot lid as the rear door and looked almost standard from the side view. I think they used some of the Maxi design for the strengthening beam above the door opening. as the hinge points look almost identical.
Darned if I know why the Wolsely should have been that fast, the engine/transmission was exactly the same as the 1800. The Austin was quite quick, and on my last day with Pressed Steel Fisher I drove one round the MIRA high speed track at 110 mph with four of us aboard, just because I could.

As for an estate Austin 3 Litre (ADO61), there never was one, at least not a BL catalogued model anyway, but Crayford made a few but no-one seems to know how many. For some reason they used the rear door from the 1100 estate, and not the Maxi door.
Doubtfull if the Rover 3.5 V8 would have gone into an 1800, they'd have needed a totally new transmission as the engine was mounted transversly, plus there just wasn't enough room fore and aft for the width of the V8. Unlike the V8 MGB where they didn't need a new transmission and there was LOADS of room.
The V8 may well have fitted into the ADO61 but then they would have been in competition with the same division of the company that made the engine! Marketing was everything in those days, and the various divisions were not meant to compete with each other.
Lots more on the 3 Litre and its variations here :-
http://www.aronline.co.uk/blogs/category/the-cars/austin-3-litre/