Close friend not a bridesmaid but so helpful

I have a really close friend of mine who I couldn’t have as a bridesmaid because at the time of choosing I wasn’t as close with her and it came down to her or my future sister-in-law so I obviously chose my SIL... However, this friend has been so supportive and helpful with SO MUCH. She’s made all my signs, table numbers, went to a fitting with me, is going to decorate my venue, etc. I invited her to my bachelorette party but I really want to do something for her as a thank you for everything she’s done. Do you any ideas for what I can do for her so she knows how much I love and appreciate her?
Thanks!