Would one of these do the trick? Other companies make similar pedals with several different sounds to choose from.
https://www.amazon.ca/dp/B082WHVNJM/ref=cm_sw_r_cp_apa_glt_i_YQX8J852K71VSRVA325M?_encoding=UTF8&psc=1
did you find a fix? here's something close i think for around $20
http://www.amazon.com/Cannon-UPSP-Bass-Drum-Spur/dp/B000A1LACQ/ref=sr_1_4?ie=UTF8&qid=1430574481&sr=8-4&keywords=bass+drum+spurs