If you have a branded shower screen then it is simply a matter of phoning the manufacturer for a replacement seal or any other bits that are broke,( I have phoned the manufacturers of Aqualux and they have sent me a new seal for a ten year old screen free!) now that's what I call customer service.If you just have a cheap and nasty variety and know where you bought it from then they should be able to give you the number of the manufacturer who will supply you with a new seal at little or no cost.
If you do decide to get a new screen remember when you buy cheap you get cheap.
The Handy Man
July 2008