Usually I found perlite around spring time, it's use in horticulture so it's easier to find during panting season, I used to get mine at lowes just make sure there is no additives.
And for deli cups http://www.tsksupply.com/pwp-128-oz-round-container/ don't forget the lids it average a little less than $1.50 per cup so big difference with Reptile Basics cups. (best pricing I have found)
Get enough to make sure to cover double clutches while usually they will be laid at about the time that the first clutch hatch sometime it happens a little bit earlier, and your female may double clutch even if you do not re-introduce a male.