The Match does not use a compensator. It is only a 3/4 pound weight that attaches to the frame rails. HK did make a Qucik-Comp but it was a piece of junk and did not work. It has been discontinued long ago and only collectors of all stuff HK have any interest in it, unless the person is unaware of how ineffectual it was. The weights are still being made but since the Match is no longer imported, the weights are more difficult to get. However, they show up from time to time on e-Bay and HKPRO and usually sell for between $250-$300. Beware buying from overseas because this is a gun part and is subject to the $100 or more law that means you must file a form 6 with the ATFE to legally bring the item into the country.
Also, if you use the match weight you really need to use a 6 inch barrel or barrel extension if you are building a Poor Boy's Match (turning a Tac into a match by adding a barrel extension and weight). Since the weight is open on the top if you use a shorter than 6 inch barrel the muzzle blast will put a fair amount of force down on the weight. Not enough to act as a compensator but enough to damage your frame rails over time.