Difficulties in parts search?

Parts list

Difficulties in parts search?

	Description	OEM Part #	Price
1	1 7730600101030 Air Box Part Right 07	7730600101030	—
	replacement
1	1 7730600111030 Air box part black 07	7730600111030	US $34.46
3	3 7730600300030 Air box cover sx black 07 07	7730600300030	US $32.59
4	4 77306001020 Rear part filter box 07 07	77306001020	US $28.10
7	7 54806008051 Quick release-nipple 03 03	54806008051	US $2.04
8	8 54806108052 Blind rivet 3,3x9,7 grooved 04 04	54806108052	US $1.21
9	9 54806008050 Quick release-spring hanger 04	54806008050	US $1.33
10	10 77306010000 Fender for filter box 04	77306010000	US $19.60
15	15 77306015000 Air Filter 07	77306015000	—
	replacement
15	15 78006015000 Air filter 07	78006015000	US $38.10
16	16 54806416000 Filter carrier 2s sx 07 07	54806416000	US $5.71
17	17 77306017000 Filter support cpl. 07 07	77306017000	US $21.83
18	18 77306018000 Filter support bush 07 07	77306018000	US $3.16
19	19 77306019000 Fasten. device filter s. sx 07 07	77306019000	US $6.63
26	26 54806426000 Caburetor connecting 2s 07 07	54806426000	US $42.01
27	27 51006027000 Hose Clamp 50-70Mm 07	51006027000	US $5.66
51	51 0017060204 Screw F. Plastic K60X20Al Sw6 WS=6;(As required)	0017060204	US $2.89
	replacement
51	51 0017060206 Screw F. Plastic K60X20Al Sw6 WS=6;(As required)	0017060206	US $2.89
79	79 77304066050 Bushing f. chain sliding pr.07 07	77304066050	US $1.60

Air Filter Diagram KTM 250 250 SX US/EU 18082498-939513