Good work Geno, you'd be surprised just how many nuts and bolts are still available from your Honda dealers or your rebuild if you need them, swing arm pin was only £21 when I bought it last year and both axle bolts are still avail, linkage bolts are a non event from Honda so either make do with what you got or start a lengthy eBay search, the linkage bolts were heavier on the 89 due to the 88 bolts bending after a while so worth replacing if you can find new ones!
If you do an eBay France search for cr250r you will find a seller called Jeanmarie ( FORGEAUDMOTOPIECES), he has some choice nos parts for our rides!