Those seats look nice but at the current exchange rate $160 Pounds Each plus shipping you're probably at $5-600 for seats. A little too rich for my blood. Going with Miata Seats in Bugsy my '68 although those would look out of place in Ray's Bugeye.
Barry, get that welder fired up. You ought to be able to take your BE Seats apart, and reweld in some new metal. I found that replacing the rubber spring membrane, why can't I think of the right term, under the seat was the best performance improvement per $ I made in driveability for Bugsy. Replacing those rubber thingy's amounted to $16 per seat and the added comfort I got was well worth what paid for. Pull the seats out of the car, turn them over and you'll find out that the seat diaphram / webbing made a huge difference in driving comfort. I also replaced DS Foam on the bottom and again made a huge difference in comfort.
My seats must come out of a later car as mine have headrests. The VB Book shows 68 seats as non headrest seats.