Spare screw on Jabsco strainer caps?

[FullCircle]

I dropped my shower pump filter screw on cap, Jabsco 46400-0002 into an inaccessible place (bloody Jeanneaus) and came home, did a search on t'internet, and found I seem only to be able to buy the whole bloody thing at 9 quid a pop. /forums/images/graemlins/mad.gif

Anyone know where I can get the clear plastic screw on cap only?

Cheers


Jim