It will take a gentle demeaner & patience as it is a bent pipe & you don't want to bend/damage or otherwise distort the replacement tube.
If all else fails, you may be able to tap & die a new inlet, put a MPT adaptor on the end of a short length copper pipe from the hardware store. That would be a bit tricky too - because of the bend.
e-mail a picture of the SVT UIM. Maybe I can come up with another (better) idea.