yeah your links don't work.
as for clean up kits I have seen this issue many times. most carry rags and junk on board. most don't carry any absorbent due to weight 40# clay is $4. Peat sorb is way more expensive but it weighs 10# for the same size bag at $28-29 per.
Peat sorb won't absorb water or glycol. when you do have a antifreeze spill in the back country is a no brainer. same as in the city dilute with water.
the link above shows how much each bag can absorb