BMC & Reservoir Question

[HR2L]

replace piece 2?

http://bmwfans.info/parts/catalog/E3...xpansion_tank/

Solid! So they're rubber seals/grommet plugs. Perfect! Thank you very much. :)

[drumad]

replace piece 2?

http://bmwfans.info/parts/catalog/E30/2-doors/USA/325i-M20/LHD/M/1990/browse/brakes/brake_master_cylinder_expansion_tank/

[HR2L]

So I was doing a visual inspection under the hood of my 90 325i and noticed I have a very minor leak under the Brake Fluid Reservoir right where it connects to the BMC. I noticed it because its made its way down the Booster. My question is do they make a new seal I can use to stop the leak, or do I have to replace the whole assembly? I've been trying to source a good known used BMC with Reservoir to replace mine and just save myself the hassle. If anyone has one that they can with 100% vouch that is in good to great working condition I would gladly pick it up. If they make a cheap seal or an actual seal from BMW that isn't Rape Sauce $$$ could you point me to a link of it.

TIA! :)