Yes, 2% TPA sweetener can be used in place of CA Super Sweet. I believe CA Super Sweet may be similar to TPA (possibly a little more concentrated and a similar Sucralose base among other enhancers).
Could try making with 2% TPA Sweetener first. Let entire mix steep for at least 1 week. Try the mixture. If not sweet enough, a drop or two of TPA Sweetener to your 5 ml. mix and re vape (shake and vape).
For 5ml bottles :1 ml.=20 Drops (10mil bottle : 1% = 2 drops)
1% = 1 drop 5% = 5 drops 10% = 10 drops 20% = 20 drops