I haven’t found it with any of the typical distributors and none of their official distributors seems to have the specific HX version. TME has only the -V version in stock. As far as I can see, the only difference is the orientation and consequently the spacing of the leads that come off the toroid. But it seems I should be able to convert the V into an HX.
Do you have another source for L1? Or any reason using a -V version wouldn’t work ?