Yup, the low-profile GT 1030 is probably the best you can do. If you got a more powerful GPU, you'd need a better PSU, something way better than the one you linked (the very cheapest 500W that's actually of minimum acceptable quality would cost you nearly triple what that one does).
Any more powerful than the 1030, you start to get into a little bit of a worry zone. First, for a modern build that uses the +12V rail -- pretty much anything in the last 15 years -- that's more or less a 180W PSU, not a 250W PSU. Also, it appears the ratings provided are at 25 degrees celsius, a very low temperature at which to provide the specs. And lastly, apart from the 1999 design, from the physical appearance of the PSU, it's also a very old PSU with a 1999 design; I would not be shocked to find out that PSU has been operating for a decade.
When all is said and done, given these issues, I'd think of this PSU more as a 140W PSU. And as such, any more than the 30W card really would make things risky. The 1030 is a suitable GPU for very basic gaming at 1080p or medium gaming at 720p with more modern titles.