Maybe you should do some sit-ups or consider switching to stretchable briefs, or even loose fitting boxers.
Bad attempt at humor...... Just go to your local music store and ask for G strings to match the ones you busted. Take the broken ones into the store or the package they came in and they(the music store) should have a big box of individual strings to suit your needs.
Peace and Guitars,
SouthPaw41L
*****ammended note(afterthought to prevous reply);*********
And another item i neglected to mention ; Most music stores WILL NOT break up a set of Elixers. It's pretty much all or nothing with 'dem bad boys. There are however other alternative coated string and they all sound pretty much the same to the novice ear
Give everything but up.