Simplified from EASA 21A.307. "Any part other than a standad part (ms bolts etc) must be acompanied by an EASA Form 1".
No choice - if you have a type-certified aircraft in EASA-land, your radio needs a Form 1 before you can install it. An FAA8130-3 from an EASA-approved FAA repair station or a new part with a manufacturer's 8130-3 is acceptable as equivalent to the EASA Form 1.