I ordered this just recently from sordan.ie (haven't received it yet)
https://www.ebay.com/itm/New-Extende...7/113479558390
Description says this:
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Licensed Cloanto Extended ROMs (2 pieces - U34 and U35) Version 2.30 for Amiga CDTV + Licensed Cloanto Kickstart 3.1 for Amiga CDTV.
On this listing you will receive 2x Extended ROMs for Amiga CDTV without labels on ROMs with separately Cloanto label sticker with license and unique serial number and also Kickstart 3.1 for Amiga CDTV.
Extended ROMs giving the Amiga CDTV an upgrade from Workbench 1.3 ROMs to 3.1 ROMs. If you have a turbo card like Savyna you can also boot your system from IDE using this item.
If you wish to upgrade your Amiga CDTV to Kickstart 3.1 you need to just remove 2 old ROMs (U34 and U35) and put the new one same way. No soldering required, only flat screwdriver. Then you need to remove your old Kickstart 1.3 and put Kickstart 3.1.
Package included:
- 2x Licensed Extended ROMs from Cloanto (U34 and U35)
- 1x Licensed Kickstart 3.1 ROM from Cloanto for Amiga CDTV
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Maybe replace the 3.1 rom with "custom" 3.1.4 and see what happens ;-)