Commercial v Home-made Protein Bars Question

I have had a go at making my own protein bars after reading they are more cost-efficient, nicer and don't upset your stomach. This can be quite difficult for me due to disabilities, but I wanted to put it to the test and eat what I hoped was food that was more natural. I have a problem getting enough protein and am one of those people who struggle to eat say a can of tuna on its own etc . I had been eating the PHD Diet Whey bars, usually between a quarter to a half bar every other day, due to them causing 'funny poo'; sorry to be so graphic but want to give the full picture. I also will make a protein drink up that thankfully gives no side-effects which is made by Pink Sun. My attempts so far seem to be more trouble than they are worth, or alternatively; have the opposite effect. As an example: today I made my best result so far. I had whizzed up half a cup of oats to a flour, mixed in 10g of unflavoured protein powder, a little nut butter, a teaspoon of pure maple syrup to sweeten and a little milk to bind together (I heated the milk and nut butter first to amalgamate). I drizzled a tiny bit of melted Green & Black's 70% cocoa solids chocolate on top. These turned out absolutely delicious and reminiscent of petit fours with a lovely marzipan flavour. The problem here was that this amount made only 4 small balls and were 52 calories each. So it would have been quite easy to polish the 4 off but I have managed to restrain myself eating just 2. Delicious as they were, they were nowhere near as satisfying as the PHD diet whey bars which have around the same calories and more protein. In fact I had left quinoa out this time as although they have protein in the carbs shoot the total up.

So what I am asking is do others make their own despite the faffing about? I did my research before having a go a few weeks ago, and found recipes in general were quite involved with many different ingredients plus the preparation. I based mine on advice I saw that said rather than faff about, just use a base of oat flour and protein flour; add your favourite other ingredients plus a bit of milk and hey presto. This has worked, but like I said, 4 small balls not much bigger than marbles was not what I expected. Thoughts and suggestions welcomed, or should I just stick with the occasional commercial PHD Diet bar?