Timing belt

1990 Daihatsu Charade, 190,000miles.

I know I should just let it rest in peace. But it broke a timing belt going down the road at 45mph. No bad noises, but I read where this car is prone to have bent valves when the timing belt breaks. Of course the smart thing to do would have been to replace the timing belt before it broke.

It would cost more than it is worth to pay a mechanic to fix it (water pump and other things were recommended when repacing timing belt).

I can get the parts and try it myself. But how do I know if there is internal damage without openeing up the motor?

Thanks,
Mike