I've found Selden parts to be stupidly expensive in the UK for whatever reason (e.g. the bottom Snapshackle on my Furlex - £62.04 UK, $30 US). They're much more reasonably priced in the US, and many US suppliers will be happy to ship internationally - or better yet, ship to a friend in the US and have them send/bring it to you. May be trickier for large unwieldy bits though.