Radio Shack has one for around $80.00. It doesn't come with a wall wart, so you'd have to get one either frommthem , or use batteries.
It has an 1/8 inch headphone socket.
But then maybe you're looking higher up than that especially if you've a large number of those cassettes to deal with.. I Hope Not !!
Belfer Audio Archive
222 Waverly Ave .
Syracuse N.Y. 13244-2010