i'm sorry about your cat, gb. he's chasing butterflies and field mice in heaven now.
i know how it feels having had to put down 2 very sick cats in the last 2 years. please consider getting another cat from a shelter right away. i know there's 2 schools of thought: take time to mourn or go out and get another pet asap.
we've found the latter works. in fact, we swear the soul of one of our old cats went into the new cat we got the day after he passed.
also, you already have to set up and all the love that a new furry family member would need.
just something to consider.