Back when I regularly made (fresh) horse manure tea, I considered any grubs and larva to be a bonus. Bug juice tea is good stuff! I personally wouldn't try to pasteurize. Also, when a compost pile heats up, good bacteria die off along with the bad. They just repopulate the pile quickly as it cools.
Kelp4less is great if you just need a small amount of multiple products to try, but if you are looking to buy in bulk, 40-50lb bags from other sources the price can easily be 50-75% less per pound compared to K4L's bulk price. It's also worth comparing prices with
Boogie Brew if you are looking to try a variety of products.
This is the best quality:price for blackstrap molasses I have found. The price fluctuates regularly, it was $16 when I purchased it. This one is very high in calcium.
Liquid molasses is a lot easier to use and store than dried. Especially if you live in a humid region...