They're in the right stardict format for koreader and for Goldendict-Ng. The html are for a browser (good for lutev3, also on pim-dictionary.neocities.org).

Add custom urls for both those too

please buy the Biggs one before using... or just use the Taitokerau dictionary, it is much better in almost every way. (if you have rights or work on either I would love to donate my time to help get an online or digital version up properly)

to do: make a script that converts the biggs one into the other formats automatically so you have to buy it