If those fit a 335i/335d along with the GTI then logic would suggest that other 335i/335d items would also fit the GTI.I bet there are a few others available.
There's a few on ebay, not sure if they would fit?https://www.ebay.co.uk/itm/284376669109?fits=Car+Make%3ABMW%7CCars+Type%3A335d&hash=item42362b9bb5:g:0-oAAOSwyJRiOXIVhttps://www.ebay.co.uk/itm/113586384904?fits=Car+Make%3ABMW%7CCars+Type%3A335d&_trkparms=ispr%3D1&hash=item1a7246b008:g:kgoAAOSwFtNcRtgo&amdata=enc%3AAQAHAAAA8PM%2FY2XSguWCnUdIQOuGiT4UEUl%2B%2FN5Fkqg7PYGH6QEow%2Fj%2BK6hDUE1QPadvSMtAJjlUf6j5lC9hyofw7h87uATjO3HIflgf%2FRLA2Qs4lr4%2FR6z2OnNdC3bvrVi3hv%2FC8Tb2I%2BEcEfG2n9PalT839mGf9LK9CVFAGW%2Fk52P%2B8%2FFpm%2BvI8mKunJRlj3aMkLBUoGLpHcqP2fikyYam2JJLbCBo1UQf%2BgftIB3J4sER1B0Hnzct7VjG29R9MQmrAvNnvu4AJj%2BgsecCYAgT6oDmO6%2BZRdTx9Xpj0W2AEX2DRvgVe8i8k%2FY41g6317E57c8NwQ%3D%3D%7Ctkp%3ABFBMyKXFgJdg
Res delete is superb, the only thing I dont like is the MK7 tail pipes are too small, but there is no way to change that unless you replace it for a new system at great expense...