I got side tracked http://www.ebay.com/itm/LSD-8087-Bu...oors-Conversion-Kit-Bolt-On-New-/310656706789
The owner of this one claims 12-14 mpg http://cgi.ebay.com/ebaymotors/1988...RVs_Campers&hash=item20d15f1a28#ht_500wt_1022
I can't see that getting 12-14 mpg but at least you found some nice doors.