Thanks the replies everyone.
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glend - I'll order some of the Bintel stuff and try it on some old eyepieces.
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LewisM - Good initiative, but personally I just prefer to buy ready-made stuff. I hardly ever use it, so I pay a one-off price for the convenience and it lasts ages.
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KISSMAD - Thanks. I did try them a while back, but they didn't respond to my email. Maybe I'll give them another go. Not to keen on their 'call or email to order' system though. Why not set up an online shopping cart system?
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RB - Good idea regarding Ebay. Never thought of that. I'll check it out.