If you want a reproduced Yume no oto CD album like me, here's how you go about it.
Click this link and download the .zip fie. It contains the .png images needed for the CD art and jewel case art and the link to download the songs [the link does not contain the songs itself]. Unlike my copy, it's more updated so that when you get yours, it won't have any missing visual features or look rough in some areas.
2) Go on Etsy and look for a seller who'll make your order. It's not that hard to find surprisingly, and usually inexpensive. BEWARE, Etsy does charge shipping fees [as expected], so depending on where you live might affect when you receive it and more importantly, the shipping costs.