I had a buldging cap issue on my Series 3 (OLED). I didn't feel comfortable soldering new ones on, but was able to find a local mom-and-pop repair place that basically did it for $17.
Also, you may want to scour Craigslist and/or ebay for the same Series 3 and use it for parts. Could be cheaper than getting one from Weaknees. Although, it might wind up having the same issue in the long run anyway.
I actually sort of did this as well. I was able to find a used & fully working Series 3 (OLED) on Craigslist for about $40. At the time, I got it mainly for its hard drive (since my S3's was failing), but I could use its power supply if I really wanted. It also came with a glo remote and USB wireless adapter. I am using and liking the glo remote for a bedroom TiVo and I was able to sell the USB wireless adapter on ebay for about $30 (since I have all hard wired Ethernet jacks). So, bottom line is I was able to get this Series 3 off Craigslist for about $10 at the end of the day. Well worth it.