Free Bopomofo font

Hello,

does anybody know a free bopomofo font? I am looking for a font where only the syllables are included, without the actual character. The syllable should then be stacked correctly, i.e. vertically with the tone mark on the right.

I would be even more pleased if it would be opentype compatible, meaning that I can write ㄓㄨㄥˋ and he will automatically create a ligature. But I guess I would also be fine with e.g. writing 重 and he will give me ㄓㄨㄥˋ .

I would also pay money (if it is not too much), but I am not in Taiwan and have no access to a computer store there, so I would prefer a free font. Quality does not have to be best, but at least nice to some degree.

Thanks!

blog.ilc.edu.tw/blog/blog/1550/r … 644/102346

From some Yilan educational site, but it seems like it only works with Big5 encoding… which is hard to output these days