Hey bud, I took a look last night and found the books you need. Here are the part numbers and some information I found for both of the manuals:
(J-model Service Manual)
If you want, you can call up a Kawi dealer and give them these part numbers and you can get a price for the manuals new. Or you can try Ronayers.com and enter the part numbers yourself which should be lower than the dealer. The service manual for the J-model lists for $53.96 from ronayers. The L-model supplement part number looks like it has been superceded by 99924-1160-52 and lists for $33.43 on ronayers. The supplement alone doesn't cover everything needed, so getting just the 1 book would leave you with a lot of holes in the information.
I've got both the books that are in very good shape. There are a few stains and grease marks on the covers and edges of the pages. But there are no torn/missing/or even wrinkled pages. Everything is legible in both books, including the wiring diagram pull-outs. I've got some pictures that I'll post, but new these would cost almost $90 together.
How about you just give me $30 shipped for both of them and I'll ship them to you USPS Priority Mail? That's cheaper than just the supplement alone and puts a little beer money in my pocket.
EGay has some on there, but they are all in the $15/per book as well. If I had a softcopy of the books, I'd just give them to ya, but I've never found them online. Do a little research and let me know what you think about that. I'll post pics of them I took last night.