Is there a way to get Android Market on galaxy s?
The Android Market is on the Galaxy S, it's a Google-approved device.

Edit: Since you aren't on Froyo already I recommend getting it through Kies Mini, download from: http://samsung.com/uk/.  That should have the Market since it's not through your carrier.  You have a GT-i9000, so you could also try a JPX-based ROM like this one: http://forum.xda-developers.com/showthread.php?t=854799