you could change the part for a real 40 or 50 Mhz part which is easy to do but customer`s should have been told it`s a overclocked part if true,perhaps some or all customer can get a refund if found the part(s) turn out not to be real,nevertheless it does not make good reading if true.
err on another note was there suppose to be another accelerator for the A1200 a long time ago but could not get hold of the 150 pin connector. where did the connector come from?