I do not know what types of forms that it is sold as. If you can find a small amount of premixed then that might be worth trying before getting the parts necessary to make up some from PI crystals.
I have PI crystals which needs to be mixed with fairly warm distilled water in a pyrex/borosilicate container so that the crystals dissolve. A borosilicate glass mixing rod is helpful. I have all these items. I received 10 borosilicate beakers yesterday 4 of which were broken so I am awaiting a replacement early next week. Fingers crossed that they pack them better this time and mark the box with fragile which they did not on the order that I received.