Unfortunately, medical foam pad is not at MoS Shop. Look for it on dropship distribution sites (Amazon, AliExpress, Temu, etc.) or at the local pharmacy stores. They have them. A bit more expensive at the local stores, but you are supporting them.
However, you don't need medical foam. Simply use the ACE wrap, flexible tape wrap, or anything that's soft. No need to go high end pricing for comfort. Simply fold the layers and make it thicker to protect the frenulum, or rather, cushion it. No matter what you do, the pressure between the plates will place a burden on the frenulum, causing that pinch, and eventually, the *snap*.
Tying the frenulum involves pinching the frenulum together to create a dying piece of skin. In due time, the dying tissues will *snap* or *tear*. The brothers also cut them with something sharp, like a medical scissor, scapel, or something sharp enough to prevent discomfort during the cut. Once that's done, wrap up and use lots of ointment to heal and prevent infection.
Professional cutting is slightly different. What the urologist does is they snip any excess skin that is a frenulum. Once they snip the skin off, they suture the remaining skin flaps together. So, there's a different appearance between a medical frenulum removal to the DIY-tying/cutting.