The killer's lawyer said the appeal wasn't about condoning his actions after the woman's death.
He was found guilty in November of murdering the woman.
"Changes need to be made to protect women."
He was convicted of her murder last year.
The campaign is in its final push for donations as it finishes tomorrow.
The appeals runs until March 6.
The collection of memories have been shared on social media.
Eight extra drop-off locations were added overnight.
The charity has already received hundreds of messages of love and support.