Before going any further - is there a clothes closet in the room or an adjacent room? If so, open the door, loosely stuff it with hanging clothes, put the back of the mic facing the open door perhaps 10 cm from the hanging clothes and voila, you have your booth. It will have way more absorption than the item in the link.

Honestly, before you do anything else - try that. It might take investment in a long mic cord to reach down the hall, and some time to cut out the unneeded extra time in your recording as you walk from your PC to the 'booth' and back.

-Scott