Let's see if bigted, Joe Carroll or someone else knows of an alternative Figarow, but I don't. I'd be drilling out the screws or grinding off their heads, if you can't unscrew them. (Note they may have hardened heads - they are obviously not original fitment. Some of the engines have the starter spot-welded on, and you drill out the spot-welds to remove the starter, then fit screws to put it back on the engine. This appears to have already happened to your engine.)
It was a really terrible idea to run the engine before you lubricated the starter spindle. You will have spalled the spindle fairly horribly now.
