I got that kit. It's excellent! My unbiased and uninformed opinion is that the Bosch filters are just fine for our older Boxsters. I chose the kit because it included a couple of free name brand filters.
Wix 51348 oil filter is available at Amazon UK, expensive and you have to buy a dozen. On US Ebay, there's this
https://www.ebay.com/itm/1348-NAPA-GOLD-OIL-FILTER-51348-WIX-Master-Pack-Of-12/162753804500?epid=1617931285&hash=item25e4e1f8d4:g:MHMAAOSwdDBZe5vC&vxp=mtr#shpCntId shipping and import duties are awful!
NAPA Gold filters are manufactured by Wix.