Lol just having some fun man, it's all good! They use standard materials I guess(acrylic?). Are you looking to do a custom engraving or a custom shape/design of the TRC?
Engraving won't be an issue for them I'm sure. Not too certain about wood and metal truss rod covers, you can try asking them. If they can't bring it in for you, your next best bet would be Guitar Workshop over at Bras Basah Complex Level 3.