I just sold my 25 year old Frog on eBay a month or two ago. Sorry mate.
However, IanH is right, the re-release is very similar to the original. The spaceframe chassis door should be easy enough to get (try eTamiya.co.uk).
The one problem I had was getting wheels and tyres. Think I have some Sand Scorcher tyres floating around somewhere which might fit.
Watch the suspension (especially the front) when you start bashing and using it. The single shock front gets alot of gunk in there and can wear pretty quick. From the shiny look of yours it looks like it hasnt been run so just keep it clean and filled with oil and replace the O-rings regularly.
Ive got 540 sized motors if that is any help to you?
P.S. these use the same bumpers as the Super Hornet if that helps track one down.
