I have had the same problem with the knock off carburetors that the low side does absolutely nothing. You probably will not be able to use anything off of it to rebuild the original one. Sae vs metric
Seems to me that with no luck (as stated above) with our sponsors or eBay for the part you want and you don’t want to try and repair it you might be out of luck on your creeper. Guess you better buy a longer driveshaft.
It actually stays for quite awhile. It’s great for putting pipe together also. I/we use it on the slide rails of forklifts and it stays good for a long time