Borrowing to Partially Pay off Mortgage

[Account Closed]

I made the newbie mistake of locking into a 5 year mortgage - at 3% in mid 2019, and then the pandemic hit in early 2020 and now rates are rock bottom and I just keep staring with disgust at my mortgage prepayment penalty wishing it would magically disappear.  I noted however that my RBC mortgage allows me to prepay 10% every 12 months without penalty - so about $35,000 in this case.  Is there any way to essentially re-mortgage the $35,000 under a second mortgage somehow and be able to get that second mortgage at the current great rates of 1.5% or less? Essentially getting a better rate on at least a portion of the mortgage during the remainder of the term? I figure it might save me about $4500 in the remaining term if I can do this once or twice.