I've given up on growing traditional squashes in the Spring - I have slightly better luck in the fall. I've tried wrapping the stems and cutting out the borers. The only partial success I've had in the last few years is succession planting (every two weeks yank out the infected plants and put in a new one) - but that's a pain, less productive than I'd like and takes more room.
This year, I'm focusing on different varieties -
Tatume squash is a great zucchini replacement - it's been a winner the last few years. Pick it small for zucchini substitute but the big ones that escape notice and turn yellow still make a decent winter squash. Give it room, it's a sprawler.
On page 47 of the 2015 Southern Exposure Seed Exchange catalog, they define the characteristics of the four squash species. Of the four, Curcurbita moschata and C. mixta are both resistant to vine borers "once the plants are beyond the seedling stage". That held true for me last year with their "Tan Cheese" pumpkins (C. moschata) - the first pumpkins I've been able to grow. I've ordered a few more of the C. moschata and C. mixta to try this year.
I'm also trying the luffas Chip mentioned as seen in this blog post: