Multiple link fails in my last post. But there are EBRs just like mine in the suspension section on 1977.
Then I went on to talk about how if you do buy these shocks, they are intended to run on bigger tires, so you won't get the full travel of the shock if you don't do some other modifications such as get larger wheels and raise the rear.
I'd bet there are some minibike forks out there that would bolt on, the problem is having the resources to try a few to see what would fit. When I read Noobster's write up on what he had to do to get his forks to fit I thought it was all super complicated because I hadn't worked with the front suspension and all the talk of pressing cups and swapping bearings made me scurred. But after taking mine apart a few times and if you have the tools, what he did wouldn't be so hard.