90 s10 blazer cab support replacement
 

I am wanting to replace the cab support mounts on my 90 s10 blazer. the 4 located under the main front floor area are rusted out. im trying to located the proper replacements and can only fint the front ones the ones under the back seat i cant seem to find. Can someone tell me if these are all 4 the same or if there is somewhere or something i can do for the back 2?