Brick.ie The Irish Association for Adult Fans of LEGO®

Hi everyone,
Ok so I've been quiet for a while, due to other priorities I haven't been around, but now it's time to start a new project.

I've begun building a new MOC and have realised how hard it is to purchase large quantities of bricks without having to go to many different sellers and purchase small quantities over a large period of time.

My question is; I need approximately 15,000 2x4 tan bricks alone for my new project, is there any way of buying these directly from LEGO, or anywhere else that people know of.

There's also a large quantity of 2x2, 1x2 and a variety of arches required. All in the same colour.

Any suggestions greatly received.
Thanks
Wes