Long-sleeve sleep sac

Ja

I have one sleep sac that has removable sleeves; the rest are sleeveless. My son’s arms get cold when he wears short sleeves so I try to put him in the sleep sac with sleeves when he wears T-shirts to bed. He’s 16 months now so I’m having a hard time finding more without going into physical stores! He’s going to be growing out of the 12-18 month one he has. Any companies you can recommend that don’t cost a fortune? I’m in Canada.