Surely these woud be available from one of the big outlets in the U.S. C/Central, C/America, ZIP etc. I'd be interested when you find out as my 87 is close to replacement. I see you have yours out, mine was converted by the same mob, and it looks like one of those jobs where you start by jacking up the car and removing all 4 wheels etc etc etc. Oh! Since they are modified, the length would now be - arbitrary, ie what ever fits the bill, will work fine. Best of luck!.