For me it has been the newborn tights you know the ones that are white and have ruffles on the butts.. Hardly anyone carries these and i still don't have one pair.. I want my baby girl to be able to wear tights when shes tiny too.. I have dresses that she can wear, but no Tights to go with them. My shower is next weekend and i am so excited to see what everyone is bringing/buying for baby.. I know my parents bought my stroller carseat combo and my aunts Bought the swing i wanted..
Amazon.com: Jefferies Socks Microfiber Rhumba Baby Tight: Clothing
Those are so cute! I never thought we needed baby tights, but those are adorable. I'm not struggling to find anything necessarily, just wish I could get some of the cloth diapering stuff I needed in stores. I've had good luck buying second hand from local mamas though, so that's good.
Have you looked into Baby Legs? Amazon.com: BabyLegs Leg Warmers, Fresca: Clothing
They are great because I will use them over thinner stockings for my almost 3 year old and they work well. They are also great paired with a onesie for easier diaper changing.
I haven't had any hard-to-find items yet but I haven't been really looking lately.