Airfix 1/32 scale kits are quite good for slot modifying - there must have been a Commer one made at some point - I'll go check ebay.
As for the venue, I have to say that I have the ultimate Scalextric track designed (but not built yet - got all the track but needs to be outdoors and no good weather yet). Just under 13 metres (tad over 40 feet) x 5.5 metres (18 feet). Will dig out the design.....
Well I used to know the AIRFIX catalogue by heart but they never did do a Commer, Though Dinky did. I wonder if Triang/minic did one that may be raceable, if so.
I used to scratchbuild aircraft , ships and carts and wagons from plasticard, might have to look into it, could be fun.
Take a while I'm still getting ready to put a BMW 5 speeder into Lara, the Midge, in time for the French blast.
