I have another CPI (somewhere), remind me when we meet for the top to see if I can find it - I'm sure spares could be handy for you... I'll never use it.
What's funny is almost 10 years ago I bought a CPI 4.3 to replace the 4.3 in a boat I had (spun a bearing) - and up until about 1 year ago I had that spider injector kicking around because the pintles/tubes were all in such good condition.