Friendly warning: the owner of this place takes extreme displeasure when people violate his very well published rules regarding selling, buying, or trading without paying for the privilege.
"Want to buy", "looking for" posts like yours are included in those that are considered buying or selling.
The penalty for the violation is a ban with no warning.
If you meant to ask where you could find that brass elsewhere, like online vendors or retail stores, that is allowed and you should edit before a moderator bans you.
If you wanted to trade or buy from a member here without paying to become a supporting member, I suggest you delete the post before you get banned.
Being new and claiming you didn't know the rules won't help.
New people can’t delete and the edit disappears on posts past a certain age as well. Once you get a little time under your belt they let you start to have a bit more control.