Your search for "Roland Alphonso" revealed the following:

THE MAYTALS [You Make Me Do / Just Got To Be]

THE MAYTALS [You Make Me Do / Just Got To Be]

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ID No. 241985 Label ROLAND & POWIE (JA) Production Studio1-60 Genre Ska / Male Vocal Group Vocal Condition VG+ ( [B] ACI) Soundclip*当時のジャマイカ盤としては綺麗な方だと思います。

THE ACES / HORACE SEATON [Bright Soul / I'm So Glad]

THE ACES / HORACE SEATON [Bright Soul / I'm So Glad]

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ID No. 225504 Label BLANK(ROLAND & POWRIE) (JA) Production Studio1-60 Genre Ska / Male Vocal Condition VG/G Soundclip* B SIde傷だらけ針によっては飛ぶと思います。

LEE PERRY [Prince & Duke / Old For New]

LEE PERRY [Prince & Duke / Old For New]

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ID No. 240743 Label BLANK(ROLAND & POWRIE) (JA) Production Studio1-60 Genre Ska / Male Vocal Condition VG Soundclip