Bought and tried surrounds from here
http://shop.ebay.com/bootapest2/m.html
6.5 " for RL 140 good fit and no problems working with them, made 2 woofers (shimming)
8" for S45, same as above
4 pcs for 6.5", 4 piece for 8 inch,4 dust caps USD 17.50, shipping to Mexico city 13,50, elsewhere some USD 60-65.00
from look and feeling (I'm no expert) same as on woofers from Martin, color a little darker
The install description on site is a joke
Beosound 3000, BL 4000, BL 8000, BG 2404,BG 5000, BG CD50, Beocord 5000, BM 901, BM 2400, BM 4000, BV S45, BV 3702. There is nothing we cannot do, but a lot of things we don't want to do!!