Amazon.com has both discs on sale for reasonable prices. Fandisk Gold (https://www.amazon.com/x30D5-x30A1-x30F3-x30C7-x30A3/dp/B00006ALYL) can be sold for $25.58 in a used/very good condition. Fandisk Silver (https://www.amazon.com/x30D5-x30A1-x30F3-x30C7-x30A3/dp/B00006ALYM), $24.72 in new condition.
But if anyone can encode the tracks from DVD Volumes 3 & 4, it’d be a bit better, but would lack the aforementioned TV-Size of "Tabidachi no Kane ga Naru".