Moz,You may want a new hex shaft also if the dizzy stripped out, the shaft end may not be all that good any more and you wouldn't want to strip a new one.
I bought a new distributor from NAPA, I take that back, it was PEP Boys and it was under $50.00. The housing shaft was triangle and when I looked at the numbers it was a D9 prefix so it was a 69 distributor and I thought they sent me the wrong one but when I compared it to an original all the critical places matched so its in the car and working now.
Like Frank said, Let us know, Im sure we can get one and send it to you.