any air brake tank from a hgv breaker will do the job or find someone selling a cheap ass 240v compressor and rob the tank it can be done ,some air-con compressors are better than others search you tube there is a few vids showing how to do it its not that hard my old Cherokee had it done not by...
if its not sharp or falling off its a pass i asked because the rear mounts ,rear sill mounts and all of the sills on mine were gone and it passed chassis is excellent though so might not have been the same if it was a monocoque
inner wings ,front panel head light supports ,inner and outer sills ,rear arch area ,boot floor ,rear cross member basically any bit made with steel the chassis is not so prone but have been know to lol around the round cross member at the rear