I have some banana shallots I grew from T&M seeds that I can plant in that bed instead luckily, but they are still tiny and only just pricked out. I had good results with those last year but they did not like being transplanted and I lost the majority at that stage. I do hate wasting the space where the sets were, so think I'll put some lettuces there for the time being until the seedling ones are bigger. I'm glad I did those now!
I have found Jermor very reliable. I have tried planting them in the autumn and the spring, and find the autumn planted ones do better in my area.