Easy button up school shirts

[Beyondthegalaxies]

Looking for a fake button up boys' school shirt in light blue. One that doesn't actually need buttoning up. The M&S ones would be perfect, but they only do white and an online search is proving fruitless.
https://www.marksandspencer.com/3-pack-boys-adaptive-easy-to-iron-shirts/p/clp60449909#intid=pid_pg1pip2g4r1c1%7Cprodflag_Easy%20Dressing%7Cprodflag_srp_ts_QP_16

Would These ones work?

If tricky to find, I would probably try either buying normal ones and adding velcro, or dying some white ones.

Thank you for the suggestions.