I see this is an old post. Hopefully you get this!
I don't drink many white teas but off the top of my head I can think of two non-silver-needle whites:  Darjeeling  Pu'er.
White Darjeeling seems to be universally expensive and is highly regarded as a "high-quality" white tea. I've had this
white Darjeeling from Upton. I find most of Upton's teas to be "meh" however I really liked this particular tea. It appears Adagio also offers a white Darjeeling however it is constantly sold out. Upton's site lists 2 other whites that are not silver-needle but I've never had them.
I've only ever heard of white pu'er. Yunnan Sourcing's
lists a few as well as others. In case you don't know about these guys, they specialize in pu'er cakes and such. However I've had good luck with other teas from these guys. For example their Wuyi rock tea is the best bang for the buck I've found yet.
PS. It seems that Chinese BiLuoChun shows up in white, green and black tea lists. This is probably because the brew tends to be like that of a white tea, though the leaves are technically processed as a green tea but the taste can range from light and sweet like a white tea to smokey and heavy like that of a black! Looking at Yunnan Sourcing's list, it seems they actually have something that looks like a white tea and is called biluochun so who knows.