I've done it the way Roger suggested, and it worked well for me because I have many of the additional wood working tools that will likely be needed.......primarily a router and various bits. A '32 should be fairly simple and might work that way without a lot of time/effort/expense, but some bed wood will need a variety of reliefs cut (e.g. for the strips mentioned, sometimes for cross member/bracket clearance). The more of those needed adds up in time and cost for a local craftsman if you don't have tools/skill, so a "pre-made" kit might be more economical if that's one of the criteria.