Zoe,
There are so many write ups in the press and the net about how comfortable the TR7 seats are.......you should still feel Ok after a longish journey.
After about 30 years they don't give the same support but all the bits are available as our learned friend John stated. Is the rubber diaphram at the bottom of the seat on its way out? Mine did that about 10 years ago and I'd slowly sunk a couple of inches without realising it.
Adam
TR7 V8 DHC Jaguar Solent Blue. 9.35cr Range Rover V8, Holley 390cfm, JWR Dual Port, 214 Cam, Lumention, Tubular Manifolds, S/S Single Pipe Exh, 3.08 Rear, 200lb Spax & PolyBushes all round, Anti- Dive, Strut-Top Roller Bearings, Capri Vented Discs & Calipers, Braided Hoses, 4 Speed Rear Cylinders, Uprated Master Cylinder & Servo, AT 5 Spokes and Cruise Lights, S/S Heater Pipes, Replacement Fuel Tank. No Door Stickers. Mine since July 1986, V8 from 1991