Hi, I looked into making some too but I am not the best on a sewing machine and I don't even have one so I would need to buy one of those too... I ended up buying some from coolababy on ebay which are all in one's, watreproof on the outside so you dont' need an extra cover plus they come with one booster in them and I purchased and extra booster for each too. I got to pick what colours I wanted and I am really happy with them (so far... I don't have a baby yet to try them out on) they are from china I think (I guess most BB'er would frown upon that) but they worked out to be about $10 each including the extra boosters. I have since looked at loads of MCN and to be honest the ones I got look very similar to pea pods but mine are adjustable for newborn through to toddler so you only need one size. As I said I haven't tried them out so I don't know if they would end up being too bulky or anything but looking at them they seem fine and good quality. I will consider buying (or making) some hemp or bamboo boosters if the microfiber ones they came with don't do the job too well. HTH