Fiona Dyball devoted a section of her talk on “road tested repertoire for prayer services at Catholic Secondary Schools” in 2018 to Taizé. She notes you can purchase then for download at their website, but good luck sorting through that lot. I have the book “Songs and Prayers from Taizé”, which is likely all you will ever need and you can buy that from them or from all over the internet including sheetmusicplus. They are also in CWB II and many are in various Willow and GIA hymnals – AOV, Gather, Worship, Gather Australia, etc – ie you may already have these somewhere. Taizé provide the text for the refrains to which I will link.
Taizé provide all sorts of extra instrumentation, but my advice is keep it as quiet and simple as possible just discrete piano or guitar with voice.
My chant backings come with the usual warning that BIAB is lousy at chant – best to watch the videos then strip it back to the minimum. Replace excess music with darkness and candles.
Confitemini Domino text CWB II 475
Eat This Bread text CWB II 484
In the Lord I’ll Ever Be Thankful text CWB II 522
Jesus, Remember Me text CWB II 526
Laudate Dominum text CWB II 531
Stay With Me text CWB II 317
Ubi caritas et amor text CWB II 633-4
Veni Sancte Spiritus text CWB II 391
Wait for the Lord text CWB II 251