Sim if you don't have a website to host your files you can put the MP3 audio and images on a blossom server, nostr:nprofile1qqs0vadhewfx8j6lae6nry26pzlquc7k2ep0gh6d3xj6k7kmcf0244cpr3mhxue69uhkummnw3ez6vp39e3x7mr59ehkyum9wfmx2uspr4mhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet5adkvg0 can publish your feed. Seems to be a good option.

I believe that this is basically what nostr:nprofile1qqsxq56r4vm0sem6p56l0cu8jfaa4l6g32ft84e8lv4y8nm6j4eu34qppemhxue69uhkummn9ekx7mp0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7dar4gf does as well.