Before I start a request submission I'm going to announce to all that there has been a creation of a clone beta jalopy created by a guy TheMattyZero on facepunch.
After several years of periodic work he decided to abandon it, only to eventually (more or less) finish it and its now supposedly released.
I've been waiting years for news of this model, and now that its here I want to make the best use of it.
Over the years there has been a few attempts to emulate parts of the beta, including one usable one (by which I mean I successfully ported it to EP2 for my own use; fully functional) from the garry'smod workshop by a guy named HighVoltage, which is a hybrid between the beta Jalopy and the Half Life 2 Buggy
There has been a port of this guy's model to Garry's Mod as a simfphys "lua car" http://steamcommunity.com/sharedfiles/filedetails/?id=923296482
which is where I first learned of it's arrival. The model is a bit badly rigged, apparently made specifically for that addon, as taking the model used in that Garry's Mod addon and recompiling it for Half Life 2 Episode 2, I wind up with the following hunk of metal, with the 4 wheels obsorbed by the passenger seat:
(I think it hit the road a little too hard, Alyx)
I am urging anyone with expertise in Source engine rigging, animating, porting knowledge to seek out and gain Matty's permission and adapt this model, for use in Episode 2.
Especially with the immense communal interest in Half Life 2 beta content this would be a must-have.
He actually completed it and released it on Facepunch a while back, somewhere around October. It was released in an old Valve Cut Content thread which I believe has since been replaced. I backed it up, though. https://1drv.ms/u/s!Ag3gW-8Gmt8fhEQxBi61P0Lc0t8k
It does have problems, though, the biggest being that Alyx doesn't seem to be able to get in.
In a recent Episode Two beta collection on hl2-beta.ru a brand new model with full EP2 support (Alyx enters the car, etc) was released. You should definitely check it out. If you don't want to download the whole mod just to get the model I can also send it to you directly.