Do a search here for 'Vintage Speed' and 'shifter', and you should find many threads about the shifters made by Vintage Speed as well as alternatives.
The consensus (if there's anything approaching a consensus about anything on this site) is that Vintage Speed is the best solution. I've been very happy with mine. They do make quite a few models, with various options, so read up on them before deciding.
And, when searching (here or on the internet), note that there's no 'ster' on the end of 'Vintage Speed'. They are an independent VW accessory maker based in Taiwan, with a good website. You can order direct or from a few US distributors.