You could always remove those two fans and stick two 80mm ones on there with zip-ties, couldn't you?
The gigabyte lp cards only have the single fan but I did try frankstein'd fans. In my case (L2) there's not a lot of space between the chassis and the card so all I could fit where some 80x80x10mm fans (cheap from China). I even re-wired one to attach to the GPU's fan connector so it could be controlled by the card. The stock fan actually had a better temp/noise peformance than the external fan(s)
I also noticed that having the shroud on/off seemed to make a significant difference so maybe it was simply the fact that I had to remove the shroud in order to get the fan(s) in there.
I didn't really push this any further so maybe there would have been a configuration where the external fan would have been better. Probably also a different story if you've got room for 25mm 80x80 fans but at that point the case is getting so large you might as well try to fit a full-height ITX-sized card.
EDIT: One final resort might be to custom-mill a proper copper heatsink with a space for a 80x80x15mm fan. But at that point you're throwing an awful lot of money at an entry level GPU.
EDIT2: I only really
care about lowest-possible-noise in idle conditions. When I'm gaming I've got audio output happening anyway (often via headphones) so noise isn't as critical. Since the Gigabyte cards are locked to 33% they are annoyingly audible at idle. (Update: I tweaked the BIOS to allow 0rpm during idle!)
I've contacted GALAX to ask whether their 1050 Ti has a lower limit on the fan rpm/percentage and I'll probably do the same for MSI. If anybody here has contacts with either of the companies that could inquire about this and if it'd be possible to BIOS-mod the fan limit if it exists that'd be much appreciated. (Update: Looks like on 10 series GPUs, BIOS modding isn't possible so far because nobody has released a tool to crack the signature scheme used)
EDIT3: Whenever I contact a company through their official support/contact channels I find myself wishing that this