Guys some info was passed to me by another member here and I have verified it to be true. The Magnavox D7140 and 7240 mono box has same cog gear but seams to be made little stronger than one in D8443. So not only do we have choice to buy the new manufactured one from VintageVolts but you can get the mono box for less than $20 and deck parts are almost 100% same minus motor, mono head and key covers