Sorry to hear of your woes. It's a bit pricey, but you could get a QHY5L-II kit - it even has the same eyepiece form factor as the ST-i.
Once you have your ST-i repaired, you can use the QHY as an electronic view finder or all-sky-camera using the supplied bits and pieces.
http://www.gamaelectronics.com.au/QHY5L2.html