You can buy these now, Just keep in mind there have a very loose fit since they are meant to be universal. They are also very cheap so keep that in mind as you can see the quality below
You can get them here https://www.etsy.com/listing/1148769299/ and if you want them with MoewToats you can...
Do you have an old mac, I know silly questions!
Well I have these little PCBs you can get that let you replace the 1/2 AA ticking time bombs with a more reliable and less prone to killing your board CR 2032
IF you want to get one for yourself you can go here...