Anybody familiar with old film cameras?

I've got a Yashica Lynx 14 that I picked up at a thrift store. It's a great camera, in great shape, however the shutter is stuck. It obviously needs to be cleaned after years of not being used, and I know I need to take the front lens out, but is there a way to do that without a lens spanner tool? I've already tried using a friction material and a small screwdriver in the little notches, but to no avail. The thing won't budge. How else can I get the lens element out? (I've already gotten out the black retaining ring with the nameplate, I just have to get out the lens.) Any help is appreciated!