There are tunes that will keep the CEL off while disabling EGR. You'll need to check what your specific state testing actually does though; many tunes won't show a CEL but also won't pass a "readiness" check if they actually plug a computer in. Talk to the tuning company - really Rocketchip, Malone and KermaTDI are your best options.
While I'm not a huge fan of Kerma's business practices they do have a unique offer where they will redo your tune for new upgrades you buy from them in the future if you get everything from them. They have a number of different turbos.
IDParts is a great supplier for parts, both general maintenance and upgrade parts. They'll have the turbo too.
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