You can cheaply get a 3-pack of the 2 most popular threaded-sizes of M2.5 or M3 squonk pins from ModMaker in the UK.
This is where I got the BF pin for my Goon v1. They are longer than necessary so that you can customized it by filing/cutting or using the dremel to your preference to fit your RDA.
if you trim it, just be sure to burnish (or file smooth @ a 45 degree angle) at the start of the threads and remove any burrs so it threads easily and also to avoid cutting yourself.
If using a dremel, it will be hot enough to give you 3rd degree burns on your fingers, so wait for it to cool or dip in some water to anneal it.
I had to remove about 2mm from the length for this to fit the Goon v1 without it hitting both of the posts in the center and connecting them, which would have caused a hard short.
Photo:
They also sell the hex allen key that fits these too, which is linked on the page for each.
Links are below:
For the M2.5 thread:
http://www.modmaker.co.uk/Mod-Makin...ts/RDA-Squonk-Conversion-M2.5-Screw-Pack-of-3
For the M3 thread:
http://www.modmaker.co.uk/RDA-Squonk-Conversion-M3-Screw-Pack-of-3
I bought a pack of each and the allen key too just in case, and it was delivered 9 days later to me in NJ, USA from the UK. So I was pretty happy with that. Especially since nearly ALL USA vendors selling a Goon squonk pin want $20 for the pin, and then charge $10 for shipping.
Total cost to me for these items, including shipping from ModMaker was like $20, because Royal Mail shipping was $14, but still better value for money that they USA vendors, at least to me with getting 6x total squonk pins and the allen key to match them.
Also, the M2.5 bf pin fits the Velocity v1 nicely, which I have not trimmed the length so it leaves a bit of juice in the well since the exit hole of the pin is about 3mm above the bottom of the juice well. I like it this way.
Hope this helps!