Life vest for a 2 year old

Where can I find in Taipei a life vest for a 2 year old? We are going for a boat trip and would like to have one of our own.
If some one has one and is willing to lend it I will greatly appreciate it too (we only need it for a week or so).

Let me know if you are still looking, sorry I don’t check here often. I found one for my 16 month old in Tienmu earlier this year. I can look up the shop info if you still need it.