I'm interested in this as well. I've been collecting parts over the last year to replace the trunk, floor, sub rails and rear quarter wells.
So far I've used SAR & Howell's for the trunk support, tail pan and rear window drain pan. I returned the rear window drain pan and tail pan to MAc's. Total crap, night and day with regard to quality. The drain pan was almost 3/4 off and crooked. Wasn't even close to stock. The Howell's pan was almost a match, minor fitting etc.