Hello there, my 307 5 multichanger has just died,been quoted silly money for a replacement,so ive decided to replace the lot(cassette deck & changer).my question is this,will a sony unit fit the 307 wiring without any probs(like it did on my 306).also is they a aftermarket plastic tray/panel available where the 5 cd changer used to fit.under the cassette...thanks...martyn.