It is hard to source M8x160 countersunk bolts and I order 100 of those for each batch. Since there are some minor differences between each batch of bolts, I machine inner diameter of sleeves according to each batch of bolts. Then I machine inner diameter of plastic bushings according to outer diameter of sleeves. I do all this to ensure everything fits well. So, I prefer to send complete lower assembly, instead just the bolt. E-mail me, and we will arrange something, don't worry. :) Congrats on new bike!