The trials ones on tartybikes.co.uk are very good but mostly 18t, the one I have on my polo bike comes in 16t and 17t too I think, if you want bigger then you're probably looking at a white industries one.
cool, white industries stuff looks ok [+ echo too] ... tbh its prolly easier to drop a few teeth on the chainring
cool, white industries stuff looks ok [+ echo too] ... tbh its prolly easier to drop a few teeth on the chainring