That sounds like the EO end-pole snuffer. And you cracked the middle section.

Why it cracked is important in figuring out what fix would work.

Was the spin pole assembly fully connected (all the parts fully inserted to each other) or did it slip out and crack?

How much downward force were you applying, and from what part of the assembly?

Are the forestay bridles standard length?

Is the spinnaker luff standard length?

Was the pole assembly just old (blistered, cracked, out in the sun too long)?

I would suspect that unless you've got significant downward force on the spin bridles you could just glass up the cracked area and you'd be fine.

If you need a boatload of force to attach the spin bridles, I'd find out why. I had an EO snuffer, and while I did have to lean on the hoop slightly (maybe 5-10 lbs of force) to attach the spin bridle, the hoop could be pushed further without major effort. There was a slight pre-bend in the spin pole, but not as much as I had with the aluminum pole (first generation)

The spin luff was set so I could grab a handful of spin luff and rotate my hand about 60 degrees until it was taught. I think that was the best compromise setting for the spin cut I had (2nd generation, before the mid-pole setup)

Hope it helps...