According to hedgehog studio the SLP works type Alpha is compatable with the 18 Tatula as well as others
[DAIWA/SLP WORKS] SLPW LT TYPE-α spool(RED) - HEDGEHOG STUDIO (hedgehog-studio.co.jp)

Plat show the SLP works as available in red and Gold
PLAT/Fishing Tackle Store-Fishing Equipment/Catalog-Optional Parts-DAIWA SLP WORKS-SLPW SPOOL-2019 SLPW LT TYPE-alpha SPOOL

On Digitaka this spool should be compatable with the Tatula based on the info from hedgehog studio but would look differnt
18 CALDIA LT 2000S it is listed as #2 to #11 spool assembly.
Parts Schematic 18_Caldia_LT_2000S.pdf (shopify.com)
DIGITAKA! - Japan Fishing Tackle Store

If you use this in a google search you'll get lots of results. daiwa slp works lt type Alpha 2000

Just a note on the SLP Works spools. You need the type Alpha not the type Beta I've ordered several of the type Beta from Aliexpress for my legalis reels. Hope that helps some.