there the sprockets that you will have to use they come in 18t and 20t and all profiles colours i think and you will have to use a euro bb to fit them to your trials frame
chris king, hope pro 2, halo http://www.chainreactioncycles.com/Models....?ModelID=12909, static £32 http://www.staticbikes.co.uk/sale.php, funn single speed bullet http://www.chainreactioncycles.com/Models.aspx?ModelID=16489