There was only ever one option available, either you buy it or you dont 😀
Of course there is always modding of the motherboard.

Only one? My Upgradeware Slot-T begs to differ. Yes, the Powerleap PL-iP3/T was the only one with built-in voltage regulator, but you only need that if the VRM on your motherboard doesn't support Intel's VRM 8.3 standard. Not that the Slot-T is much cheaper or easier to find these days - but in situations where it would work you could also mod a generic FC-PGA slocket.

So OP, which motherboard you have is relevant for what your options are. It helps to be complete and specific.

If you're willing to do a simple pin mod, the MSI MS-6905 Master is a personal favorite of mine. With the reservation that I prefer running 440BX at 100MHz FSB and never tried 133MHz out more than briefly , I've had no trouble with Tualatin CPU:s in those whatsoever.

Note that the mobo's VRM controller needs to support outputting voltages < 1.8 aswell, it won't work with any Slot1 mobo.

There are also interposer boards for Tualatin CPU:s that does more or less the same thing electrically, if you want to avoid modding the slotket. There at least used to be premodded CPU:s available on Ebay if you don't want to solder it on yourself.