Hey Stuart, heres a thought!
there is a rumour that Yorksud, Richard, is ready to let his S4 spider go, and it will be in the classifieds shortly.
Ive seen corners of it from under its duvet, but knowing Richard it will be hanging, NO, only joking, Branson of York will have maintained very well i'm sure.
Might be worth looking into rather than the potential outlay into yours, and use yours to offset the expenditure somewhat?
Shrew