You are lucky that you inherited free clothing that fit your daughter that are also really nice quality brands. Since this seems to be a real issue for you I think you handled it ocorrectly.
However..... Your statement and I quote "I feel like I'm the Salvation Army or something." seems to be out of line. I am a stepmom myself, and wife to a man who pays child support to a woman for their 2 adorable children. The way we handle this (our sittuation is probably a lot different from yours, I don't know what you've gone through and really can't say one way or the other if I'd have reacted the same way) the BM in our sittuation actually sends clothes for the kids when we have our parenting time with the kids. Out of 52 wks a year we are granted 9 of those weeks and only 5 of those are consecutive (the kids live 500+ miles away). She sends clothing, if we see something that they have out grown or is ripped or whatever and really need replacing we replace it. It is your duty as a parent to take care of your children and this inclueds clothing and whatever else they need. If something is ruined while they are with us we replace it also. I would want her to do the same for us. I just think that you need to think of it as benefitting your daughter not the ex taking things from you and not returning them. If this truly bothers you then I suggest you do as you did this last time. Just use the clothing that she sends your child in.
However..... Your statement and I quote "I feel like I'm the Salvation Army or something." seems to be out of line. I am a stepmom myself, and wife to a man who pays child support to a woman for their 2 adorable children. The way we handle this (our sittuation is probably a lot different from yours, I don't know what you've gone through and really can't say one way or the other if I'd have reacted the same way) the BM in our sittuation actually sends clothes for the kids when we have our parenting time with the kids. Out of 52 wks a year we are granted 9 of those weeks and only 5 of those are consecutive (the kids live 500+ miles away). She sends clothing, if we see something that they have out grown or is ripped or whatever and really need replacing we replace it. It is your duty as a parent to take care of your children and this inclueds clothing and whatever else they need. If something is ruined while they are with us we replace it also. I would want her to do the same for us. I just think that you need to think of it as benefitting your daughter not the ex taking things from you and not returning them. If this truly bothers you then I suggest you do as you did this last time. Just use the clothing that she sends your child in.