Sorry for the delay, but I have other things more pressing... Like my Cabby died, and life outside of the forum.
What exactly do we need to moderate except for the mk5 move... I mean it's an 88 and a Caddy, so it has more incommon with a mk2 than a mk5, and
even tho i put it in the mk1 forum as it is a Caddy, mk1's stopped at 93 with the Cabriolet, and Caddy's stopped being mk1's in 84.
I would assume that the OP has the 1.6 or 1.7 Diesel and possibly a Turbo install.... I suspect that he is NonConus, (not Continental US) and would be sourcing parts from the UK, or Mainland Europe.
www.vwheritage.com . werk34.de are 2 sites that I am familiar with across the pond.
I also know of a Gentleman from Greece that can source parts as well.
If they are non-uk based as in where the OP is located, which helps to place in your Profile, then VWheritage usually doesn't include the VAT tax on the final bill.
Now for parts information the ETKA is a good place to start and they have listings in Europa for the 88 Caddy, as over here in the USofA they were never really called a Caddy, but a Pickup Truck and only go up to 85.
https://volkswagen.7zap.com/en/rdw/caddy/ca/1988-43/
As yours could be classed either as a mk2 and not a mk1 as it has more inline body and drive train wise to the mk2, but I will leave it in the mk1 forum for now, as it appears to be an irritant to the mk5 crowd we all know how elletist the upper echelons of Rabbit owners can be

LOL Just Joking..... with 14 posts you are a little presumptuous in how fast we should moderate, when a post isn't flagged specifically for moderation but is one of those that we have to find on our own,,, but I suspect that I could place you on Moderation...

just Kidding, as I have moved the thread out of your forum. Oh By the Way, placing the general area of the world where you live in your Profile helps us help you a tad faster.