There is an amendment to Part-FCL, currently between the EU Commission and EU Parliament, that will do the job for you. It amends FCL.625 to read:
(c) Renewal
If an IR has expired, in order to renew their privileges, applicants shall comply with all of the following:
(1) complete a refresher training at an ATO, if deemed necessary by the ATO to reach the level of proficiency needed to pass the instrument element of the skill test in accordance with Appendix 9 to this Annex;
(2) pass a proficiency check in accordance with Appendix 9 to this Annex in the relevant aircraft category;
(3) hold the relevant class or type rating unless otherwise specified in this Annex.
(d) If the IR has not been revalidated or renewed in the preceding 7 years, applicants for the IR shall pass again the IR theoretical knowledge examination and skill test.
(e) Holders of a valid IR on a pilot licence issued by a third country in accordance with Annex 1 to the Chicago Convention shall be exempted from complying with the requirements in points (c)(1) and (d) when renewing the IR privileges contained in licences issued in accordance with this Annex.
(f) The proficiency check mentioned in points (c)(2) and (e) may be combined with a proficiency check performed for the renewal of the relevant class or type rating.”;
So, provided that your FAA IR is valid, you will not be required to complete refresher training or to re-take the theoretical knowledge examinations but just pass an IR proficiency check. Certain member states (e.g. UK and Slovakia(?)) have already implemented this by derogation but others are waiting for the amendment to pass into law, which should be late this year or early next.