I checked the armrest and it might be possible to adapt it but I'm not going to attempt it. The following link is to the identical armrest on eBay so you can see the configuration more clearly.

http://cgi.ebay.com/ebaymotors/ISUZU...#ht_1574wt_989

If someone wants to experiment with this armrest or needs the little latch prong thing I'll send it along to you free. I have 2 of them. Just send me your mailing address.