I have spoke to Homer with regards to this group buy and after discussions from this thread http://www.mkivsupra.net/vbb/showthread.php?238875-Simple-low-mount-seat-frame.&highlight=seat+mounts
I have, made some jigs and test fitted into a mates supra.
standard frame 330mm between folds, squiggled line on far rail is where its cut for the shorter frames, this will be the size of the ones Jamie had made. 475mm overall width using 50mm x 10mm steel so 375mm in side
Extended frames 490mm from fold to the end with the same widths, these are as low to the floor as possible
I can make these from mild steel, stainless and ally, have them painted powder coated.
as for the seat mounting ideally they need to be mounted in the car for you to suss the right seating position then drill the holes.
I can make an ally set up 50mm X 10mm (Short set) £150
(Long set) £185
Mild steel 50mm x 10mm (Short set) £100
(Long set) £115
The mild steel will come painted in black or silver let me know once order is placed
Spoke to a powder coater, depending on the amount bought you will be looking at £15 - £20 on top for the mild steel or ally, he has most colours but im not sure if he will want a batch of random colours at that price (can check after interest shown), these would look great in a satin black or silver. (if I can get over 10 orders powder coating will be free)
mitchell9006 is the man to speak to about polishing, i can post direct to him after fabrication.
Postage of these will vary due to weight (will know the amount when first batch sent)
Please note due to the mild steel being 10mm thick these are fairly heavy.
I will require a min of 5 from either ally or mild steel to start the group buy, i can make an unlimited amount.
any questions just ask.
John