they mic out to .187...which is 3/16". I found that Menards carries that size bearing in their hardware section....2 bearings were 40 cents. They also have 3/16" springs in the same area in 1.5" which can be cut to give you 2 replacement springs.
Not sure when you bought those, but I placed an order with him not much after your post, and he was closing up shop due to some family circumstances...not sure if anyone else will be able to order for future stuff, he stated that he was closing down the shop, and needs to remove the website.
V1 Vicky -
Virtue OLED board w/ grips
"Good intentions and kind words are great, but your actions define who you are." Me