Making your own suet is easy as 1 - 2 - 3!
1) Gather your supplies: a tub of lard (from any grocery store), peanut butter, and any fillers you want (raisins, cranberries, peanuts, oats, sunflower seed, cornmeal, etc.)
2) In a saucepan, mix equal parts lard and peanut butter (I used half a tub of lard for a batch) and melt until mixed evenly. Remove from heat and add your fillers in the quantity you desire.
3) Line a baking pan with waxed paper, then pour the mixture in the pan and set aside to cool. Will take hours to set. Once hardened, you can scoop out by the spoonful to fill a log feeder, for example, or cut into squares to fill a suet cage feeder (simply freeze what you don't use for later).