I'm looking for a working TEAC A-2340R or A-2340SX 4-track Reel-to-Reel tape recorder, or an equivalent machine (such as TEAC TCA-43 or AKAI GS-400D SS), a 1/4-inch, 4-track machine that plays and records all four tracks simultaneously in one direction at 3.75 ips. Additional speeds are OK, but the machine MUST have 3.75 ips. I need a WORKING machine, not a fixer-upper. All functions on the machine must work properly. I'm not a collector, and I'm not fussy about cosmetics. As long as the machine works, I'll be satisfied. I need more than one machine. I have over 4,000 hours of tapes on 7" reels to digitize, and I'm using multiple digitizing workstations.