Sterling Bath TubPerforma CollectionSeries 710460" x 29" x 17-1/4"Also Available as a Bath/Shower Unit (71040112)ADA CompliantHigh-Gloss BathFeatures Sloping Backrest to Provide Better Lumbar SupportIncludes Tub Liner to Protect Bath During InstallationCSA CertifiedDrain at LeftTub Only; Faucet, Drain and Other Accessories Sold SeparatelyAbove-Floor-Drain Construction that Provides 3" Drain to Floor Clearance24.2³Ship Weight: 79 LbsPlease Note: All Sterling Vikrell Products are Non-Returnable
The only reason I got this tub is that it was the only 29" x 60" tub I could find at the time. I needed those dimensions because I was replacing a 29" x 60" tub in a bathroom where it was impossible to relocate the plumbing because a huge main joist was in the way, as a result of cowboy contractors of the 1950s when the house was built.
There are two things I dislike about this tub.  The 60" side that is exposed is so flexible that it will not retain caulk between the floor and the base of the tub, causing a leak to the room below: one plumber has suggested that we use oil based silicone caulk to allow for more expansion and contraction of the joint: I am also thinking of attaching a 60" long bar at floor level to impart greater rigidity.  One end of the tub, the end opposite the faucet, has about a 140 degree angle with respect to the floor, instead of the usual angle of around 100 degrees. This makes an already short tub even shorter.
It took a long search to locate a 29" x 60" tub, but if you can find something else, go have a look at it.
If you cannot find another tub, and are forced to accept 29" x 60", then think of ways to make the exposed 60" panel more rigid. If I had it to do over again, I would cement a rigid bar on the inside of the skirting to prevent flexing.