Bostwick joined Stevenage from Ebbsfleet in May 2008
Michael Bostwick's late header preserved Stevenage's unbeaten home record but saw them slip down to third spot in Blue Square Premier.
The visitors went ahead with their first chance of the game when Aaron Burns teed up Rob Williams to head in.
Stevenage piled forward with Mitchell Cole twice going close and Adam Drury, Lee Boylan, Darren Murphy, Stacy Long and Peter Vincenti all wasting chances.
But Bostwick rescued a point when he headed home in second-half injury-time.
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