Just for fun,, I did a quick search on sleezbay for pin gauge sets. I found one set,, that was a .061 to .500 set,, with a mix & no guarantee of all of them being there,, but they looked it,, for $10.00 with no bids.
I also found several other sets that may have a couple missing but looked to be pretty complete for under $50. And of course,, I found a few new, name brand complete new sets that were over $200-$250.
I did this because I purchased a set a few years back new,, and complete for about $75. And I saw how a single pin can average $4-6 each. This was why I suggested a set. Heck,, that set at $10 has a lot of them below the .250 & I'm thinking of buying it.
The costs associated with single pins can quickly exceed the cost of a complete set. But I do understand being on a budget,, and maybe thinking you'll never need any others. I almost went that route when I was looking for my pin gauges,, and decided to get the set over "just a few." I've found I made the right choice by getting a set.
I truly hope the ones you got will do all you need!