If unavailable then give them a call.

Cove lights are my favorite, ain't bother by dust since hidden plus it's easy for light replacement. These days recessed lights all LED, in any case if LED bulb spoil, have to remove entire casing and may result to damage plaster ceiling. For my home, I'll make sure my main lights are cove then followed by track lights, recessed lights more for back-up or decorative purposes.

Unlike before when using PLC tube with ballast, those old school lights are easier to replace but their consider outdated.

i planned to buy lots of stuff from taobao via ezbuy. and most of the item falls under the prime category so the shipping cost will be cheaper. now most of the item is not available anymore 

so i would like to explore other alternative that could offer something similar